blob: b5911d59fc33b25f1923ba8e0f702f3a843c8f95 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <map>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "ui/wm/core/wm_core_export.h"
#include "ui/wm/public/activation_change_observer.h"
namespace aura {
class Env;
class Window;
namespace ui {
class Shadow;
namespace wm {
class ActivationClient;
class ShadowControllerDelegate;
// ShadowController observes changes to windows and creates and updates drop
// shadows as needed. ShadowController itself is light weight and per
// ActivationClient. ShadowController delegates to its implementation class,
// which observes all window creation.
class WM_CORE_EXPORT ShadowController : public ActivationChangeObserver {
// Returns the shadow for the |window|, or NULL if no shadow exists.
static ui::Shadow* GetShadowForWindow(aura::Window* window);
ShadowController(ActivationClient* activation_client,
std::unique_ptr<ShadowControllerDelegate> delegate,
aura::Env* env = nullptr);
~ShadowController() override;
bool IsShadowVisibleForWindow(aura::Window* window);
// Updates the shadow for |window|. Does nothing if |window| is not observed
// by the shadow controller impl. This function should be called if the shadow
// needs to be modified outside of normal window changes (eg. window
// activation, window property change).
void UpdateShadowForWindow(aura::Window* window);
// ActivationChangeObserver overrides:
void OnWindowActivated(ActivationChangeObserver::ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) override;
class Impl;
ActivationClient* activation_client_;
scoped_refptr<Impl> impl_;
} // namespace wm